$\left(3\right)-\:\left[\left(-2\right)-\:\left(-5\right)\right]$
$x\:+\:-10=15$
$\sin\left(\arctan\left(x\right)\right)=\frac{x}{\sqrt{x^2-1}}$
$\frac{bx+6}{x}$
$\frac{1}{2}\cdot10$
$-11-\left(-14\right)-\left(-1\right)-\left(-13\right)$
$\frac{1}{\sin\left(x\right)}-\frac{\cos^2\left(x\right)}{\sin^2\left(x\right)}=1$
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